DTC U0311: General Description
The motor control module in the power control unit (PCU) can be updated by a software rewriting device connected via CAN lines. Each control module has program version information as ROM values and compares its own with the others by transmitting/receiving the values via CAN lines. The PCU needs to be updated with the other modules. If the PCU detects that its own software is not the latest version, the warning indicator comes on and the motor control module stores a DTC.